Cutter-head for grooving-machines.



V H. B. ROSS. (JUT'IER HEAD FOR GROOVING MACHINES.

APPBIGATION TILED MAY 31, 1906.

937,962. Patented Oct. 26, 1909.

2 SHEETS-SHEET 1.

H. B. ROSS.

CUTTER HEAD roaencovma MACHINES.

APPLICATIGN FILED KAY 31, 1906.

Patnted Oct. 26, 1909.

2 SHEETS-gKEET 2.

wiknem HARRY B. ROSS. 0F BELOIT, WI

UNITED STATES PATEN T ()lil l (3E.

SCONSIN, ASSIGNOR TO THE BERLIN MACHINE \JORKS. OF BELOIT, WISCONSIN.

CUTTER-HEAD FOR GROOVINGJVLACHIIIES.

Specification of Letters Patent.

Application filed Key 3!, 1906. Serial No. 319,577.

T 0 all whom it may concsr Be it known that. I, HARRY B. Ross, :1 citizen of the Unit d States, rcsiding at. Bcloit, in the county of Rock and State of Wisconsin, have invented certein new and useful Improvements in Cutter-Heads for Grooving-Macliincs, of which the following is a sp cification, reference being bad therein to the accompanying drawing.

This invention relates to an improved cutter head for grooving machines and is enibodicd in the construction and arrangement of parts to be described and defined in the claims.

In it general ap lication, the present invciiiion is design for use in connection with Hl.:l..l!lllt-S for cutting grooves in the edges of boards into which groove a tongue is dcngncd to fit, that is to say forming the conventional groove as one o the component parts of the tongue and groove joint.

Hcretofore grooving machines of this type have had cutter heads wherein the grooving cutters were arranged at the (miter plane of the head and tne planing cutters were arranged alternately and being of sufficient width to plane oft the edge of the board,

the planing cutters and grooving cutters or bits bcing nlternatcly arranged? 'VVhile it is a. matter of no particular importance to secure a rc -icrly finished surface to the bottom of t ic groove, it is important. that the outer surface or edge of the blank or board should be properly plane-l and finished. To acquire this it i necessary to have the plan- 'in cutters properly positioned m as to be Bil stantizilly uniform as to the concizti'iciry Of the utting edges. To secure this propel uniform positioning of the cutter edges of the planing cutters, itis exceedingly d1tlicult when adjustment is resorted to.

My invention is designed to enable the putters to be made perfectly true as to their,

' relative ositions by permitting them to be ground own while the head is under speed and so without interfering with the more extensively projected grooving; cutters.

l-i'hile the cutting edges of the planer knives may be adjusted to exactlv the same radial distances from the axis of the head, yet,0 wing to possible eccentricity in the shaft. of the cutter-head under speed, such adjustment does not avoid irregularity and unevenness in the planed surfaces; but where Patented ()Cicu, moo.

the planer knives are ground wlnic the h ad is under normal 0 alive speed. this unevenness can be avoided. since the cutting: edges may thereby be formed at equal distances from the center of rotation of the head.

\Vitli the above aim in view, the invention resides in a construction of cutter-head hereinafter described aiidclainicd. which pcrniits the grooving cutters, which normally rojcct beyond the circular ath of the planingcutters, to be removed, wl im desired, so as to permit the head carrying the inning k ives to be rotated at ill norms speedngaiiist. it fixed grinding surface.

In the drawings, l have shown an cmhodi-,

ment. of the invention but it is to be understood that the csscntial characteristic of the invention can be secured by various other structures, nioditii'ratious or changes without departing from the invention.

Figurc 1 is a top plan view of the cutter head. Fig. 2 is a, side elevation. Fig. 3 is a longitudinal vertical section, Fig. 4 is an elevation showing the grooving cutter head ren'iovcd, and Fig. 5 is a detail view of a clamping bolt.

As is usual, the grooving cutter heads'are arranged to revolve on a vertical axis which latter is represented at A, the head being sleeved over the shaft. and secured thereon in any convenientiii-inner.

B designates the planer head, and C the grooving head. The planer head is formed with a cylindrical bearing part 13' and a llunge part. In the flange part are formed the retaining seats for. the planing knives IF, the latter being clamped in the seats by slotted bolts 12 and b passing through openings in the flange and capped by nuts, all ofv which is of usual and well known constru' tion, with this variation that the bolts are formed with threaded upper ends 6 as shown in Fig. 4. There are four planing cutters shown spaced equidistance apart and secured and clamped in place. I

The removable grooving head C- is in the form of a circular disk of considerable thickness and having a central bore fitting over the sleeve or cylindrical part B of the planing cutter head. This head C carries the narrow grooving cutters c, the same fitting in roperly fashioned retaining grooves and eing there clamped in position by bolts D, the

, bolt.

Itwill be observed that all the grooving cutters are carried by the supplemental removable head (1 so. that when the head is moved up, as shown in Fig. 4, the planer head can readily be presented to a cutter sharpener and thereby have the cutting edges ground uniform as to their position relative to. the center or axis of rotation. To effect this independent removability of the grooving head C, the bolts 5 are, as stated, elongated and provided with threaded upper ends. These threaded upper ends are projected throu h apertures in the grooving cutter head and are capped by suitable nuts, as shown in Fig. 3, which serve the purpose of drawing the grooving cuttcr head tightly down into proper position relv ative to the planer cutter head. In practice, but two of such bolts will probably be necessary. To permit. the movement of the heads relative to each other, suitable openings are made in the respective heads into which the ends of the headed bolts and bolts 2') pass.

In some instances, it is desired to vary the position of the grooving cutters so as to make the cut more or less toward the edge of the board or plank and with that in view I have provided a series of set bolts E passing through the inner head with their upper ends arrange to bear against the groovlng head.- By adjusting these bolts 11 the.

oovmg head is prevented from sing lowered beyond the bolts E on which the head is securelyclamped by thenuts on the bolts b.

then properly adjusted and secured in place.

I a m aware that rotary cutter-heads having a pair of coiiperating cutterrheads each carrying a series of cutters and adjustable more or less relatively to each other to vary the size of a groove or bead cut thereby are old; but my invention is of an entirely difove relative to the work is ferent character and for an entirely different '6 par use from such devices.

aving thus described the invention, what i is claimed as new and desired to be secured by Letters Patent is 1. A rotary cutter-head for grooving ma 7 chines, comprising a cylindrical bearing member adapted to be mounted on the cutter-shaft, a radial flange thereon constituting a laner head, a series of planer knives in sai. planer head, disk loosely sleeved on 7 said cylindrical bearing member, a series of groovin cutters secured to said disk and PIOJGCliHg beyond the path of travel of the edges of said planer knives, and means for removably securing said disk to said planer 8 head whereby to effect Withdrawal of the grooving cutters from the lane of the planer knives to permit grinding of the latter at full speed.

2. A rotary cutter-head for grooving ma- 8 chines, comprising a. cylindrical bearing member adapted to be mounted on the cutter shaft, a radial flange thereon constituting a planer head, a series of planer knives in said planer head, a disk loosely sleeved on said 9 cylindrical bearing mem er, a series of" grooving cutters secured to said disk and projecting beyond the path of travel of the edges of said planer knives, and bolts and nuts rcniovably uniting said planer head and 9 disk, whereby said last-named parts may be readil separated to permit the grinding of the p aner knives without interference by said grooving cutters.

3. A. rotary cutter-head for ooving machines, comprising a planer diced and a grooving head adapted to be mounted side by side on a cutter-shaft, the adjacent sur-- faces of said heads being channeled to re: ceive planing knives and grooving bits, respectively, a series of transversely slotted bolts secured in said planer head and extending into transverse openings in said grooving head, a corresponding series ofplaner knives seated in the channels of said planer head and' passed through the slots of said bolts and clamped by the latter to said planer head, a series of transversel slotted bolts secured in said grooving hea and extending into transverse openings in said planer head, a corresponding series of groovmg bits seated in the channels of said ov-- ing head and dpassed through the slots of said last-name bolts and c amped thereby to said groovinghead, and means for secur-v ing said heads together, substantially as de-' scribed.

In testimon whereof I afiix my signature in presence 0 twp witnesses.

HARRY B. Ross?" 

